/**
    *    Copyright 2009-2015 the original author or authors.
    *
    *    Licensed under the Apache License, Version 2.0 (the "License");
    *    you may not use this file except in compliance with the License.
    *    You may obtain a copy of the License at
    *
    *       http://www.apache.org/licenses/LICENSE-2.0
    *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  package org.apache.ibatis.datasource.unpooled;
  
  import java.util.Properties;
  
  import javax.sql.DataSource;
  
  import org.apache.ibatis.datasource.DataSourceException;
  import org.apache.ibatis.datasource.DataSourceFactory;
  import org.apache.ibatis.reflection.MetaObject;
  import org.apache.ibatis.reflection.SystemMetaObject;
  
  /**
   * @author Clinton Begin
   */
  public class UnpooledDataSourceFactory implements DataSourceFactory {
  
    private static final String DRIVER_PROPERTY_PREFIX = "driver.";
    private static final int DRIVER_PROPERTY_PREFIX_LENGTH = DRIVER_PROPERTY_PREFIX.length();
  
    protected DataSource dataSource;
  
    public UnpooledDataSourceFactory() {
      this.dataSource = new UnpooledDataSource();
    }
  
    @Override
    public void setProperties(Properties properties) {
      Properties driverProperties = new Properties();
      MetaObject metaDataSource = SystemMetaObject.forObject(dataSource);
      for (Object key : properties.keySet()) {
        String propertyName = (String) key;
        if (propertyName.startsWith(DRIVER_PROPERTY_PREFIX)) {
          String value = properties.getProperty(propertyName);
          driverProperties.setProperty(propertyName.substring(DRIVER_PROPERTY_PREFIX_LENGTH), value);
        } else if (metaDataSource.hasSetter(propertyName)) {
          String value = (String) properties.get(propertyName);
          Object convertedValue = convertValue(metaDataSource, propertyName, value);
          metaDataSource.setValue(propertyName, convertedValue);
        } else {
          throw new DataSourceException("Unknown DataSource property: " + propertyName);
        }
      }
      if (driverProperties.size() > 0) {
        metaDataSource.setValue("driverProperties", driverProperties);
      }
    }
  
    @Override
    public DataSource getDataSource() {
      return dataSource;
    }
  
    private Object convertValue(MetaObject metaDataSource, String propertyName, String value) {
      Object convertedValue = value;
      Class<?> targetType = metaDataSource.getSetterType(propertyName);
      if (targetType == Integer.class || targetType == int.class) {
        convertedValue = Integer.valueOf(value);
      } else if (targetType == Long.class || targetType == long.class) {
        convertedValue = Long.valueOf(value);
      } else if (targetType == Boolean.class || targetType == boolean.class) {
        convertedValue = Boolean.valueOf(value);
      }
      return convertedValue;
    }
  
  }